JP6211454B2 - PRESSURE DEVICE FOR TIRE COMPONENT AND TIRE MOLDING DEVICE - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a tire constituent member pressurizing apparatus and a tire forming apparatus that pressurize a tire constituent member disposed on a forming drum.

  At the time of tire formation, various tire constituent members are arranged on a forming drum, and a raw tire is formed by a plurality of tire constituent members. Further, at a predetermined stage of the tire molding, the tire constituent members are joined or the air is pushed out, and the tire constituent members are pressurized by a pressurizing device on the outer periphery of the molding drum. Regarding the pressurization of the tire constituent member, conventionally, there is known an apparatus that pressurizes a plurality of rolls (pressure rolls) attached to a shaft and pressurizes the tire constituent members with a plurality of pressurizing rolls (Patent Literature). 1).

  In the conventional apparatus described in Patent Document 1, a pressurizing medium (pressurizing medium) is supplied through a passage in the shaft, and a plurality of pressurizing rolls are pressurized by the pressurizing medium. Moreover, a some pressurization roll pressurizes a tire structural member, displacing corresponding to the surface shape of a tire structural member. However, in this conventional apparatus, the number of passages that can be formed on the shaft and the route of the passages are limited, so that it is difficult to form the same number of passages as the plurality of pressure rolls in an independent state. Therefore, for example, in one control zone in which a plurality of pressure rolls are combined, the pressure roll is pressurized by a pressure medium having the same pressure, and the pressure of the pressure roll is controlled for each control zone.

  As described above, in the conventional apparatus, it is difficult to change the pressure of the pressure medium for each pressure roll, and individual pressure control of the plurality of pressure rolls cannot be easily performed. For example, the pressure applied to the tire constituent member may be changed according to each part of the tire constituent member, or the pressure applied to each part of the tire constituent member may be changed in order to adjust the joining amount of the tire constituent member. is there. However, as described above, the conventional apparatus cannot easily meet such a request. In addition, when the pressure of a plurality of pressure rolls is individually controlled by this conventional apparatus, it becomes difficult to form a passage to the shaft corresponding to an increase in the number of routes and routes, and a device including the shaft The structure becomes complicated.

Japanese Patent No. 3742111

  The present invention has been made in view of the above-described conventional problems, and an object of the present invention is to prevent a complicated structure of a pressurizing device that pressurizes a tire constituent member with a plurality of pressurizing rolls, and to perform a plurality of pressurizing operations. It is easy to perform individual pressure control of the roll.

The present invention relates to a pressure device for a tire component member that pressurizes a tire component member arranged on a forming drum, and includes a shaft member and a plurality of pressure members that are displaced around the shaft member to pressurize the tire component member. A pressure roll, an inner space formed around the shaft member on the inside of the plurality of pressure rolls, and a plurality of support portions that support the pressure rolls so as to be rotatable from the inside and are displaced together with the pressure rolls And a plurality of pressure holes formed in a plurality of locations of the shaft member corresponding to the positions of the plurality of pressure rolls and in the pressure direction of the tire constituent member from the inside of the shaft member, respectively, move within the pressure holes. And a plurality of moving members that protrude from the pressure holes in the pressure direction of the tire constituent member and pressurize the support portion and the pressure roll fixed to the tip portion, and the inner space around the shaft member. Pressurization of moving member in pressure hole A plurality of supply pipes for supplying a body, a pressing device of a tire component member having a.
Moreover, this invention is a tire shaping | molding apparatus provided with the shaping | molding drum by which a tire structural member is arrange | positioned, and the pressurization apparatus of a tire structural member.

  According to the present invention, it is possible to easily perform individual pressure control of a plurality of pressure rolls while suppressing the complexity of the structure of the pressure device that pressurizes the tire constituent member with the plurality of pressure rolls. .

It is a side view showing a schematic structure of a tire forming device of this embodiment. It is a front view which shows the pressurization apparatus of the tire structural member of this embodiment. It is sectional drawing which shows the pressurization apparatus of the tire structural member cut | disconnected by the YY line | wire of FIG.

Hereinafter, an embodiment of a pressurizing device and a tire forming device of a tire constituent member of the present invention is described with reference to drawings.
The pressurizing device for a tire constituent member of the present embodiment is provided in a tire forming device for forming a tire (raw tire), and pressurizes the tire constituent member arranged on a forming drum. A tire constituent member is a member which constitutes each part of a tire, and consists of one member or a plurality of members combined. On the outer periphery of the forming drum, the tire component pressing device pressurizes various tire components (inner liner, carcass ply, belt, tread rubber, etc.).

FIG. 1 is a side view showing a schematic configuration of a tire forming apparatus 1 of the present embodiment.
As shown in the figure, the tire molding apparatus 1 includes a supply device 3 that supplies a tire component 2, a molding drum 4 on which the tire component 2 is disposed, a pressure device 10 for the tire component 2, and a control device ( (Not shown). The tire molding device 1 is controlled by a control device to execute a tire molding operation, and the pressurizing device 10 pressurizes the tire constituent member 2 from the outer periphery.

  The supply device 3 includes a transport device 5 that transports the tire constituent member 2, and supplies the tire constituent member 2 to the molding drum 4 in accordance with the rotation of the molding drum 4. The molding drum 4 is a cylindrical drum that molds the tire constituent member 2, and is rotated at a predetermined speed around the axis line by a rotating device (not shown) having a motor or the like. The tire constituent member 2 is wound around the outer periphery of the forming drum 4, arranged at a predetermined position on the outer periphery of the forming drum 4, and formed into a cylindrical shape by the forming drum 4. The pressurizing device 10 pressurizes the tire constituent member 2 toward the molding drum 4 during the placement of the tire constituent member 2 on the molding drum 4 or after the tire constituent member 2 is arranged on the molding drum 4.

FIG. 2 is a front view showing the pressurizing device 10 of the tire constituent member 2 of the present embodiment, and shows a part of the pressurizing device 10 as viewed from the X direction of FIG.
As shown in FIGS. 1 and 2, the pressure device 10 includes a shaft member 20 that extends linearly, a pair of holding members 11 that hold both ends of the shaft member 20, and a plurality of rotatable members that surround the shaft member 20. The pressure roll 12 and a moving device 13 for moving the shaft member 20 are provided. The shaft member 20 is a non-rotating core member arranged inside the plurality of pressure rolls 12 and penetrates the plurality of pressure rolls 12 in the axial direction. The plurality of pressure rolls 12 are arranged in the axial direction of the shaft member 20 and are sequentially adjacent to each other around the shaft member 20. The pair of holding members 11 connect the shaft member 20 to the moving device 13.

  The moving device 13 is, for example, a piston / cylinder mechanism, and moves the shaft member 20 together with the plurality of pressure rolls 12 in the radial direction of the forming drum 4. By the moving device 13, the shaft member 20 approaches the molding drum 4 or moves away from the molding drum 4. Further, the plurality of pressure rolls 12 are moved by the moving device 13 to a position in contact with the tire constituent member 2 and a position away from the tire constituent member 2. The plurality of pressure rolls 12 are annular pressure members that rotate in contact with the tire component 2, and pressurize the tire component 2 in a predetermined pressure direction P.

  When the tire constituent member 2 is pressurized, the shaft member 20 is disposed along the tire constituent member 2 at the pressurizing position, and the plurality of pressure rolls 12 are juxtaposed along the outer peripheral surface of the tire constituent member 2. Here, the shaft member 20 is disposed in parallel to the axial direction of the forming drum 4. At a predetermined position in the circumferential direction of the forming drum 4, the plurality of pressure rolls 12 presses the entire width of the tire constituent member 2. As the molding drum 4 rotates, the plurality of pressure rolls 12 move relatively in the circumferential direction of the molding drum 4 to pressurize the entire tire constituent member 2 in the circumferential direction. At that time, the pressurizing device 10 is configured so that each of the plurality of pressurizing rolls 12 has a tire configuration by a pressurizing mechanism (pressurizing mechanism) (not shown) provided inside the plurality of pressurizing rolls 12. Pressure is applied in the pressing direction P of the member 2. The pressure direction P of the tire constituent member 2 is the direction of pressure applied from the pressure roll 12 to the tire constituent member 2, and the width direction of the tire constituent member 2 is a direction parallel to the axial direction of the molding drum 4. It is.

FIG. 3 is a cross-sectional view showing the pressure device 10 of the tire component 2 cut along the YY line in FIG. 2, and shows the pressure device 10 cut along a plane orthogonal to the axial direction of the shaft member 20. Yes. FIG. 3 shows one pressure roll 12 that pressurizes the tire component 2. The pressure roll 12 is displaced between the position shown in FIG. 3A and the position shown in FIG. 3B. The plurality of pressure rolls 12 operate independently as in the pressure roll 12 shown in FIG.
As shown in the figure, the pressure device 10 displaces the plurality of pressure rolls 12 in a predetermined direction around the shaft member 20 while surrounding the shaft member 20. Here, the plurality of pressure rolls 12 are displaced independently of each other in a direction opposite to the pressure direction P of the tire constituent member 2 and the pressure direction P (hereinafter referred to as the opposite direction R). The plurality of pressure rolls 12 are pressed against the tire constituent member 2 and pressurize the tire constituent member 2 in the pressurizing direction P.

  The pressure device 10 is formed in an inner space 30 formed inside the plurality of pressure rolls 12, a plurality of annular support portions 14 disposed inside the plurality of pressure rolls 12, and the shaft member 20. The plurality of pressure holes 21, the plurality of moving members 15 inserted into the plurality of pressure holes 21, the plurality of supply paths 22 connected to the plurality of pressure holes 21, and the plurality of connections attached to the plurality of supply paths 22. A part 16 and a plurality of supply pipes 17 connected to the plurality of connection parts 16 are provided. The inner space 30 is formed around the shaft member 20 inside the plurality of pressure rolls 12 and continues along the axial direction of the shaft member 20.

  The plurality of support portions 14 are respectively connected to the inner periphery of the pressure roll 12 and support the pressure roll 12 so as to be rotatable from the inside. In this state, the plurality of support portions 14 are respectively displaced integrally with the pressure roll 12, and the plurality of pressure rolls 12 rotate in the circumferential direction of the support portion 14, respectively. Here, the bearing is used to pressurize the tire constituent member 2. That is, the pressure roll 12 is an outer peripheral member of the bearing, and the support portion 14 is an inner peripheral member of the bearing. A plurality of balls (not shown) are inserted between the pressure roll 12 and the support portion 14. The support portion 14 is located between the pressure roll 12 and the shaft member 20 and surrounds the shaft member 20. The shaft member 20 is disposed inside the plurality of support portions 14 and forms an inner space 30 between the plurality of support portions 14.

  Thus, the inner space 30 is a space formed between the shaft member 20 and the support portion 14, and is formed around the shaft member 20 in a state where the shaft member 20 does not contact the support portion 14. . The inner space 30 around the shaft member 20 includes a displacement space 31 for displacing the plurality of pressure rolls 12 and a piping space 32 in which the plurality of supply pipes 17 are disposed. The piping space 32 is formed on both sides of the shaft member 20 located in the displacement space 31, and the shaft member 20 and the displacement space 31 are located between the pair of piping spaces 32.

  The displacement space 31 is a part of the inner space 30 and is a space for displacing the plurality of pressure rolls 12 in the direction R opposite to the pressure direction P of the tire constituent member 2. Due to the displacement of each pressure roll 12, the position of the shaft member 20 relatively changes in the displacement space 31 inside each pressure roll 12. Accordingly, the pressure roll 12 is displaced in the direction R opposite to the pressure direction P with respect to the shaft member 20 together with the support portion 14. The piping space 32 is a part of the inner space 30 excluding the displacement space 31 and is used for arranging a plurality of supply pipes 17.

  The plurality of pressure holes 21 are formed at a plurality of locations of the shaft member 20 corresponding to the positions of the plurality of pressure rolls 12 and in the pressure direction P of the tire constituent member 2 by the pressure roll 12 from the inside of the shaft member 20. Has been. Specifically, at least one pressure hole 21 is linearly formed in the shaft member 20 on the radially inner side of each pressure roll 12. One end of the pressurizing hole 21 opens at the end of the shaft member 20 on the molding drum 4 (tire component 2) side, and the other end of the pressurizing hole 21 is located in the shaft member 20. Here, two pressure holes 21 are formed in the shaft member 20 in a parallel state on the radially inner side of each pressure roll 12, and ends of the two pressure holes 21 located in the shaft member 20. However, they are connected by the supply path 22.

  The moving member 15 is a rod-shaped movable member (piston) that is movable in the pressure hole 21 and moves in the center line direction of the pressure hole 21 (direction R opposite to the pressure direction P of the tire constituent member 2). The cross-sectional shape orthogonal to the center line direction of the pressure hole 21 is a circular shape, and the moving member 15 is a cylindrical member. Moreover, the moving member 15 has a sealing member (not shown) attached to a portion in the pressurizing hole 21 and seals the pressurizing hole 21 with the sealing member. The distal end portion of the moving member 15 positioned outside the pressure hole 21 is fixed to the support portion 14, and the support portion 14 and the pressure roll 12 are displaced around the shaft member 20 by the movement of the moving member 15. Each of the plurality of moving members 15 moves in the pressure hole 21 and protrudes from the pressure hole 21 in the pressure direction P of the tire constituent member 2 so that the support portion 14 and the pressure roll 12 fixed to the front end portion are tired. The component member 2 is pressurized in the pressing direction P.

  The shaft member 20 has a guide portion 23 formed on the inner periphery of the pressure hole 21, and guides the moving member 15 that moves in the pressure hole 21 by the guide portion 23. Here, the guide portion 23 is the inner peripheral surface of the pressure hole 21 and contacts the outer peripheral surface of the moving member 15. In the pressure hole 21, the moving member 15 is guided by the guide part 23 by sliding on the guide part 23 and moves in the direction of the center line of the pressure hole 21. The plurality of support portions 14 are connected to the shaft member 20 only by the moving member 15 and are held only by the shaft member 20. When the pressure roll 12 rotates, the support portion 14 is held by the moving member 15 so as not to rotate. Further, when the pressure roll 12 is displaced, the support portion 14 is displaced around the shaft member 20 integrally with the pressure roll 12 without contacting the shaft member 20.

  The plurality of supply paths 22 are respectively formed in the shaft member 20 and supply a pressurizing medium for pressurizing the moving member 15 into the pressurizing hole 21. The pressurizing medium is, for example, a fluid adjusted to a predetermined pressure, and is supplied from the outside of the shaft member 20 to the end of the pressurizing hole 21 in the shaft member 20 through the supply path 22. The moving member 15 is pressurized at a predetermined pressure in the pressing direction P of the tire constituent member 2 by the pressurizing medium supplied into the pressurizing hole 21. The support member 14 and the pressure roll 12 are pressurized by the moving member 15, and the pressure roll 12 pressurizes the tire constituent member 2 with a predetermined pressure. When the tire constituent member 2 is pressurized, all the moving members 15 fixed to one support portion 14 are pressurized with the same pressure. Therefore, each supply path 22 supplies a pressurized medium having the same pressure to the two pressure holes 21 corresponding to each pressure roll 12.

  The connection portion 16 is a joint for piping, and the plurality of connection portions 16 are respectively attached to the end portions of the supply path 22 outside the shaft member 20. The plurality of supply pipes 17 are respectively connected to a supply device (not shown) for supplying a pressurized medium and a connection portion 16, and are connected to the supply path 22 by the connection portion 16. The pressure medium supply device is connected to the ends of the plurality of supply pipes 17 outside the inner space 30. The supply pipe 17 extends along the axial direction of the shaft member 20 in the inner space 30 and is connected to the supply path 22 to be connected. The pressure medium of the tire constituent member 2 is supplied from the supply device into the pressure hole 21 through the supply pipe 17 and the supply path 22.

  The plurality of supply pipes 17 supply the pressure medium of the moving member 15 into the supply path 22 and the pressure hole 21, respectively. At that time, the pressure is adjusted to a predetermined pressure for each pressurized medium supplied to the plurality of supply pipes 17 by the supply device. The plurality of supply pipes 17 supply pressure media whose pressures are independently adjusted to the pressure holes 21. The plurality of supply pipes 17 are arranged in the inner space 30 (pipe space 32) around the shaft member 20 and are accommodated in the inner space 30 between the shaft member 20 and the support portion 14. Here, the plurality of supply pipes 17 are divided into two groups, and are arranged in the piping space 32 on one side and the other side of the shaft member 20 and are relatively displaced in the displacement space 31. It arrange | positions in the position which does not contact the member 20. FIG.

  When a tire is molded by the tire molding apparatus 1 (see FIG. 1), first, the tire component 2 is supplied to the molding drum 4 by the supply device 3, and the tire component 2 is wound around the outer periphery of the molding drum 4. At that time, the shaft member 20 is moved by the moving device 13 to bring the plurality of pressure rolls 12 into contact with the tire constituent member 2. Further, a pressure medium is supplied into the plurality of pressure holes 21 from the plurality of supply pipes 17 (see FIG. 3), and the plurality of pressure rolls 12 are respectively pressurized by the moving members 15. Due to the pressure medium in the pressure hole 21, the moving member 15 protrudes from the pressure hole 21 in the pressure direction P of the tire constituent member 2 and presses the pressure roll 12 against the tire constituent member 2. Accordingly, the plurality of pressure rolls 12 pressurize the tire constituent member 2. When the pressure roll 12 is pressed by the convex portion generated on the surface of the tire constituent member 2, the pressure roll 12 is displaced in the opposite direction R while pressing the tire constituent member 2.

  In a state where the moving member 15 protrudes most from the pressure hole 21 (see FIG. 3A), the shaft member 20 contacts the support portion 14 on the opposite direction R side. In this state, when the pressure roll 12 is displaced in the opposite direction R, the moving member 15 gradually moves into the pressure hole 21. When the moving member 15 cannot move into the pressure hole 21 (see FIG. 3B), the displacement of the pressure roll 12 in the opposite direction R stops. The pressure device 10 presses the tire constituent member 2 arranged on the forming drum 4 with the plurality of pressure rolls 12 in a state where the plurality of pressure rolls 12 can be displaced. Further, the pressure device 10 individually adjusts the pressure of the pressure medium supplied to the pressure hole 21 through the plurality of supply pipes 17 to adjust the pressure applied to the moving member 15 and the pressure roll 12. As described above, the pressure device 10 individually controls the pressures of the plurality of pressure rolls 12 and pressurizes each part of the tire constituent member 2 with a predetermined pressure by the pressure rolls 12.

  When joining the end portions of the tire constituent member 2, the tire constituent member 2 is pressurized by a plurality of pressure rolls 12 while the molding drum 4 is rotated. At that time, the pressure of each pressure roll 12 is adjusted according to the shape, shrinkage amount, or elongation amount of the tire constituent member 2 to adjust the deformation amount of the tire constituent member 2 by each pressure roll 12. Thereby, the edge part of the tire structural member 2 is formed in a target shape, and the joining amount of the tire structural member 2 is adjusted. Moreover, the pressure of the several pressure roll 12 is made high in the junction part of the tire structural member 2, and the tire structural member 2 is reliably joined by a high pressure. When the plurality of tire constituent members 2 arranged on the molding drum 4 are brought into close contact with each other, the air between the plurality of tire constituent members 2 is pushed out by the pressurization of the plurality of pressure rolls 12, and the plurality of tire constituent members 2 are in contact with each other. Make sure that it is in close contact.

  In the pressurizing device 10 for the tire constituent member 2 described above, the plurality of supply pipes 17 are arranged in the inner space 30 around the shaft member 20. Therefore, the number of supply pipes 17 corresponding to the number of pressure rolls 12 can be easily arranged inside the plurality of pressure rolls 12 without complicating the structure of the pressure device 10. Further, by changing the pressure of the pressure medium supplied to the plurality of supply pipes 17, the pressure of the plurality of pressure rolls 12 can be accurately changed. Thus, individual pressure control of the plurality of pressure rolls 12 can be easily performed while suppressing the complexity of the structure of the pressure device 10.

  When the moving member 15 is moved, the moving member 15 is guided by the guide portion 23 formed on the inner periphery of the pressure hole 21, so that the pressure roll 12 is accurately moved only by the guide portion 23 and the moving member 15 in the pressure hole 21. Can be guided to. Further, by holding the support portion 14 by the moving member 15, the support portion 14 can be reliably held with a simple structure. Since the inner space 30 includes the displacement space 31 and the piping space 32, when the position of the shaft member 20 in the displacement space 31 changes, the contact between the shaft member 20 and the plurality of supply pipes 17 is prevented. Can do.

  Depending on the number of supply pipes 17, the plurality of supply pipes 17 may be arranged in the piping space 32 on both sides of the shaft member 20 or in the piping space 32 on one side of the shaft member 20. Good. When the plurality of supply pipes 17 are disposed in the piping space 32 on both sides (one side and the other side) of the shaft member 20, for example, the one side supply pipe 17 and the other side supply pipe 17 are connected to the axis of the shaft member 20. The supply paths 22 are alternately connected along the direction. The support portion 14 may be a single member or a plurality of combined members. For example, the support portion 14 may be configured by an annular inner peripheral member fixed to the moving member 15 and an annular outer peripheral member that supports the pressure roll 12.

  DESCRIPTION OF SYMBOLS 1 ... Tire shaping | molding apparatus, 2 ... Tire structural member, 3 ... Supply apparatus, 4 ... Molding drum, 5 ... Conveyance apparatus, 10 ... Pressure apparatus of a tire structural member, 11 ... Holding member, 12 ... Pressure roll, 13 ... Moving device, 14 ... Supporting part, 15 ... Moving member, 16 ... Connection part, 17 ... Supply pipe, 20 A shaft member, 21 a pressurizing hole, 22 a supply path, 23 a guide part, 30 an inner space, 31 a displacement space, 32 a piping space.

Claims (5)

A pressing device for a tire constituent member that pressurizes a tire constituent member arranged on a molding drum,
A shaft member;
A plurality of pressure rolls that are displaced around the shaft member and pressurize the tire component,
An inner space formed around the shaft member inside the plurality of pressure rolls;
A plurality of support portions that respectively support the pressure roll so as to be rotatable from the inside, and are displaced integrally with the pressure roll;
A plurality of pressure holes formed in a plurality of locations of the shaft member corresponding to the positions of the plurality of pressure rolls and in the pressure direction of the tire constituent member from the inside of the shaft member;
A plurality of moving members that move within the pressure holes, project from the pressure holes in the pressure direction of the tire component, and pressurize the support portion and the pressure roll fixed to the tip portion,
A plurality of supply pipes arranged in an inner space around the shaft member, each supplying a pressure medium of a moving member into a pressure hole;
A pressurizing device for a tire constituting member. In the pressurization device of the tire constituent member according to claim 1,
The shaft member is a pressure device for a tire constituent member having a guide portion that is formed on an inner periphery of the pressure hole and guides a moving member that moves in the pressure hole. In the pressurization device of the tire constituent member according to claim 1 or 2,
The plurality of support portions are connected to the shaft member only by the moving member, and are pressed by the moving member and are a pressure device for a tire constituent member. In the pressurization device of the tire constituent member according to any one of claims 1 to 3,
The inner space around the shaft member is a pressure device for a tire constituent member comprising a displacement space for displacing a plurality of pressure rolls and a piping space in which a plurality of supply pipes are arranged.   5. A tire molding apparatus comprising: a molding drum on which a tire constituent member is disposed; and a tire constituent member pressurizing device according to any one of claims 1 to 4.

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